7304.59.20.55 - Having an outside diameter exceeding 114.3 mm but less than 190.5 mm

This HTS classification, 7304.59.20.55, pertains to seamless tubes, pipes, and hollow profiles made from iron or steel, specifically of other alloy steel, and having a circular cross-section. The defining characteristic of this subcategory is its outside diameter, which must exceed 114.3 mm but remain less than 190.5 mm. These products are generally intended for industrial applications, aligning with the broader scope of tubular products suitable for boilers, superheaters, heat exchangers, condensers, refining furnaces, and feedwater heaters, although they are not specifically designated for such specialized use within this precise diameter range.

To differentiate this category from its siblings, focus is placed on the precise measurement of the outside diameter. For example, codes 7304.59.20.40 and 7304.59.20.45 cover smaller diameter tubes, while codes 7304.59.20.60 through 7304.59.20.80 encompass larger diameter pipes and tubes. This specific range of 114.3 mm to 190.5 mm ensures that only articles falling within these precise dimensional parameters are classified here.

As this node represents a leaf category within the HTS structure, there are no further subcategories to introduce. Classification at this level is therefore dependent solely on meeting the criteria for material (other alloy steel), construction (seamless), cross-section (circular), and the specific outside diameter range outlined. Examples of products that would fall under this classification include specialized steel tubing used in mid-sized industrial fluid transfer systems or structural components where precise diameter is critical.